[Objective: Understand the Hypothesis Test of Proportions from Two Populations]

Multiple Choice

[Objective: Understand the hypothesis test of proportions from two populations] Which of the following is not a condition that must be checked before proceeding with a two-sample test?

A) Both samples must be large enough so that the product of each sample size ( n₁ and n₂ ) and the pooled estimate, is greater than or equal to 10 .
B) Each sample must be a random sample.
C) The samples must be independent of each other.
D) Each sample must be from populations with the same standard deviation.